Side Folding Grille Installation Part 2: Checking the Site

Installing Side Folding Door Site Verification

In part 1 of this series, we covered the complete tool list for installing a side folding door, and mentioned potential pitfalls related to tool selection and how to avoid them.

In this post, we’re going to cover checking your delivery and your site before starting to install your new side folding security grille. This is an essential step that can save you time and headaches. While Dynamic Closures guarantees our doors match what you ordered, we can’t guarantee that your build site hasn’t changed since the order was made.

Every door comes with a PDF copy of the installation instructions, which outline the essential steps. The information below adds some helpful notes.

Checking Your Delivery

The first step is to ensure that all your boxes have arrived, and that they’re in good condition. We ship our doors in boxes that are numbered in installation order. Depending on the size of your door, there can be up to 20 boxes. Check your packing slip and make sure that they’ve all arrived.

Also make sure your boxes are undamaged. We’ve had clients report everything from crushed boxes to holes in the boxes from forklifts that have gone right through them, and of course a damaged box can mean potential damage to the door inside. If a box is missing or damaged call our customer service number at 1-800-663-4599.

If all of your boxes have arrived in good condition, put them aside. We recommend a thorough check of the site before opening the boxes.

Checking the Site

1. Measure the Opening

Measure door opening

Your delivery should be accompanied by the original layout drawing that was provided to us when we designed the door. Check that the overall height and width of the actual opening matches the drawing.


Overall opening width tolerances are generous, about 3”. This is because the individual panels in your door are 4”, 7”, or 11” wide, and the overall door has some give to it when closed. If your opening is more than 3” wider than what was specified in the drawing, call our Customer Service department.

Height tolerance is about 1 ¼”, as there needs to be a slight gap under the door. If the difference in the actual opening is more than that the gap will be too large. It will not only look foolish but the locking bolt won’t reach the floor socket.

If your door is going above a counter, the height tolerance is about ¾”.

Check the Header

Check header

The header needs to be able to support the weight of the track and the door, and should be made of wood, steel, or a similar material (see our PDF for more information). The site plan should include the header, and you can check with the construction supervisor to confirm that the header was installed and is made of a continuous material.

The area above the pocket also needs to be verified.

Ensure the Floor is Level

Check floor level

Check the entire opening including the pocket area to ensure it is level. Tolerance is 1 ¼” for the entire opening. We know concrete work can vary in quality, and it’s why we allow for a gap underneath all our doors when we build them.

Countertops are usually installed very level, so it should be well within the ¾” tolerance.

Check the Pocket for Debris and Protrusions

The pocket will contain the full door stack when the door is open, so it needs to be clear. Sometimes construction debris is thrown into the pocket. We’ve also heard of cases where handrails were installed on the public side of the pocket, and long screws jutted into the pocket opening. As you can imagine, the damage to the door was considerable.

Next Post: Installing the Track

Now that your tools are assembled, your door is delivered, and your site is checked, you’re ready to start installing.

In the meantime, if you have any questions about ordering or installing a side folding security grille, please don’t hesitate to contact our expert customer support team.

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